Calculations of Long Pulsed Lasers for Lithotripsy

Abstract

Urinary stone fragmentation with long pulsed Ho:YAG laser (wave lengthequal 2.1 μm) and Er:YAG laser (wave length equal 2.94 μm) investigated in thispaper.Fragmentation efficiency of these two lasers is measured by using various energysettings. Laser induced crater depth and ablation volume for both lasers wereexamined and compared using mathematical model. Theoretical results werecompared with experimental results obtained by Hyun Wook Kang.The study shows that the theoretical results and experimental results arecomparable, and the crater depth when using Er:YAG laser was more than that onHo:YAG laser.